Don't put all eggs in one basket, if i were you i would be bitcoins, ethereum a part of them holding and a part of them trading if you have knowledge, mining is only profitable if you have free electricity but we will not know what will happen at the halving time.
and there is also another problems as stated in mining speculation section....
The growth "exponential" of hashing power!
You can estimate by now up to 2/3 months....
and even with free electricity you can't stay safe enough